Deviceization of high-performance and flexible Ag2Se films for electronic skin and servo rotation angle control

Yue-Xing Chen, Xiao-Lei Shi, Jun-Ze Zhang, Mohammad Nisar, Zhong-Zhao Zha, Zi-Nan Zhong, Fu Li, Guang-Xing Liang, Jing-Ting Luo, Meng Li, Tianyi Cao, Wei-Di Liu, Dong-Yan Xu, Zhuang-Hao Zheng () and Zhi-Gang Chen ()
Additional contact information
Yue-Xing Chen: Shenzhen
Xiao-Lei Shi: Queensland University of Technology
Jun-Ze Zhang: Shenzhen
Mohammad Nisar: Shenzhen
Zhong-Zhao Zha: Shenzhen
Zi-Nan Zhong: Shenzhen
Fu Li: Shenzhen
Guang-Xing Liang: Shenzhen
Jing-Ting Luo: Shenzhen
Meng Li: Queensland University of Technology
Tianyi Cao: Queensland University of Technology
Wei-Di Liu: Queensland University of Technology
Dong-Yan Xu: The Chinese University of Hong Kong
Zhuang-Hao Zheng: Shenzhen
Zhi-Gang Chen: Queensland University of Technology

Nature Communications, 2024, vol. 15, issue 1, 1-13

Abstract: Abstract Ag2Se shows significant potential for near-room-temperature thermoelectric applications, but its performance and device design are still evolving. In this work, we design a novel flexible Ag2Se thin-film-based thermoelectric device with optimized electrode materials and structure, achieving a high output power density of over 65 W m−2 and a normalized power density up to 3.68 μW cm−2 K−2 at a temperature difference of 42 K. By fine-tuning vapor selenization time, we strengthen the (013) orientation and carrier mobility of Ag2Se films, reducing excessive Ag interstitials and achieving a power factor of over 29 μW cm−1 K−2 at 393 K. A protective layer boosts flexibility of the thin film, retaining 90% performance after 1000 bends at 60°. Coupled with p-type Sb2Te3 thin films and rational simulations, the device shows rapid human motion response and precise servo motor control, highlighting the potential of high-performance Ag2Se thin films in advanced applications.

Date: 2024
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DOI: 10.1038/s41467-024-52680-0

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